BFA
BFA, Area, Lab, VAL1, VAL2, VAL3, VAL4
Defines a body-force load on an area.
AreaArea to which body load applies. If ALL, apply to all selected areas (ASEL). A component name may also be substituted for
Area.LabValid body load label. Load labels are listed under "Body Loads" in the input table for each element type in the Element Reference.
Discipline Body Load Label Label Description Structural TEMP temperature FLUE fluence Thermal HGEN heat generation rate Magnetic TEMP temperature JS current densities Electric TEMP temperature CHRGD charge density Acoustic IMPD impedance sheet TEMP temperature VAL1,VAL2,VAL3Value associated with the
Labitem or a table name for specifying tabular boundary conditions. Use onlyVAL1for TEMP, FLUE, HGEN, CHRGD. ForLab= JS in magnetics, useVAL1,VAL2, andVAL3for the X, Y, and Z components. ForLab= IMPD in acoustics,VAL1is the resistance andVAL2is the reactance in ohms/square. When specifying a table name, you must enclose the table name in percent signs (%), e.g., BFA,Area,Lab,%tabname%. Use the *DIM command to define a table.VAL4If
Lab= JS,VAL4is the phase angle in degrees.
Notes
Defines a body-force load (such as temperature in a structural analysis, heat generation rate in a thermal analysis, etc.) on an area. Body loads may be transferred from areas to area elements (or to nodes if area elements do not exist) with the BFTRAN or SBCTRAN commands. Body loads default to the value specified on the BFUNIF command, if it was previously specified.
You can specify a table name only when using temperature (TEMP) and heat generation rate (HGEN) body load labels.
Body loads specified by the BFA command can conflict with other specified body loads. See Resolution of Conflicting Body Load Specifications in the Basic Analysis Guide for details.
Graphical picking is available only via the listed menu paths.
In a mode-superposition harmonic or transient analysis, you must apply the load in the modal portion of the analysis. Mechanical APDL calculates a load vector and writes it to the MODE file, which you can apply via the LVSCALE command.
This command is also valid in PREP7.